Excel2003 Table Encryption method
When you enter Excel, click Tools on the menu bar. Then select the bottom of the "Options" button, in the pop-up "Options" window, we choose "Security", at this time, we can "open password" after the box to enter the password, and then press the OK button, and then re-enter it again.
Tip: There are two keys to setting a password
The first item: "Open permission password" means that if you save the form password, you must enter a password to open the preview or modify the form.
The second item: "Password to modify" means that after the password is set, we can preview the reading of the table, but can not modify it to save, if modified to save as a copy.
Encryption method in Excel2007 table
Open Excel2007, click the Office button in the upper-left corner, and then select Prepare to encrypt the table by clicking "Encrypt document" in the pop-up list.